• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >Ecosystem resilience despite large-scale altered hydroclimatic conditions
【24h】

Ecosystem resilience despite large-scale altered hydroclimatic conditions

机译：尽管大规模改变了水文气候条件，但生态系统的复原力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

21世纪初期全球干旱状况有所加剧。本文作者rn描述了一个全球生态系统样本中的植物群落对rn干旱压力的反应，将其作为生态系统恢复能力rn的一个度量，并将来自21世纪初的数据与来自rn20世纪末的数据进行了比较。他们存不同时司rn尺度上和不同地点发现了用水效率数值的一个rn共同范围，其中本世纪干旱年份的增加尚未影rn响生态系统冈应降水较多年份而降低用水效率rn的能力。这项研究将能帮助我们了解植被生产rn会怎样对所预测的、随气候变化发生的水文气rn候条件的改变做出反应，这对有关粮食生产和rn资源管理的决策有重要意义。%Climate change is predicted to increase both drought frequency and duration, and when coupled with substantial warming, will establish a new hydrodimatological model for many regions. Large-scale, warm droughts have recently occurred in North America, Africa, Europe, Amazonia and Australia, resulting in major effects on terrestrial ecosystems, carbon balance and food security. Here we compare the functional response of above-ground net primary production to contrasting hydroclimatic periods in the late twentieth century (1975-1998), and drier, warmer conditions in the early twenty-first century (2000-2009) in the Northern and Southern Hemispheres. We find a common ecosystem water-use efficiency (WUE_e: above-ground net primary production/evapotranspira-tion) across biomes ranging from grassland to forest that indicates an intrinsic system sensitivity to water availability across rainfall regimes, regardless of hydroclimatic conditions. We found higher WUE_e in drier years that increased significantly with drought to a maximum WUE_e across all biomes; and a minimum native state in wetter years that was common across hydroclimatic periods. This indicates biome-scale resilience to the interannual variability associated with the early twenty-first century drought-that is, the capacity to tolerate low, annual precipitation and to respond to subsequent periods of favourable water balance. These findings provide a conceptual model of ecosystem properties at the decadal scale applicable to the widespread altered hydroclimatic conditions that are predicted for later this century. Understanding the hydroclimatic threshold that will break down ecosystem resilience and alter maximum WUE_e may allow us to predict land-surface consequences as large regions become more arid, starting with water-limited, low-productivity grasslands.
机译：21世纪初期全球干旱状况有所加剧。本文作者rn描述了一个全球生态系统样本中的植物群落对rn干旱压力的反应，将其作为生态系统恢复能力rn的一个度量，并将来自21世纪初的数据与来自rn20世纪末的数据进行了比较。他们存不同时司rn尺度上和不同地点发现了用水效率数值的一个rn共同范围，其中本世纪干旱年份的增加尚未影rn响生态系统冈应降水较多年份而降低用水效率rn的能力。这项研究将能帮助我们了解植被生产rn会怎样对所预测的、随气候变化发生的水文气rn候条件的改变做出反应，这对有关粮食生产和rn资源管理的决策有重要意义。%Climate change is predicted to increase both drought frequency and duration, and when coupled with substantial warming, will establish a new hydrodimatological model for many regions. Large-scale, warm droughts have recently occurred in North America, Africa, Europe, Amazonia and Australia, resulting in major effects on terrestrial ecosystems, carbon balance and food security. Here we compare the functional response of above-ground net primary production to contrasting hydroclimatic periods in the late twentieth century (1975-1998), and drier, warmer conditions in the early twenty-first century (2000-2009) in the Northern and Southern Hemispheres. We find a common ecosystem water-use efficiency (WUE_e: above-ground net primary production/evapotranspira-tion) across biomes ranging from grassland to forest that indicates an intrinsic system sensitivity to water availability across rainfall regimes, regardless of hydroclimatic conditions. We found higher WUE_e in drier years that increased significantly with drought to a maximum WUE_e across all biomes; and a minimum native state in wetter years that was common across hydroclimatic periods. This indicates biome-scale resilience to the interannual variability associated with the early twenty-first century drought-that is, the capacity to tolerate low, annual precipitation and to respond to subsequent periods of favourable water balance. These findings provide a conceptual model of ecosystem properties at the decadal scale applicable to the widespread altered hydroclimatic conditions that are predicted for later this century. Understanding the hydroclimatic threshold that will break down ecosystem resilience and alter maximum WUE_e may allow us to predict land-surface consequences as large regions become more arid, starting with water-limited, low-productivity grasslands.

著录项

  • 来源
    《Nature》 |2013年第7437期|349-352a3|共5页
  • 作者

    Guillermo E. Ponce Campos; M. Susan Moran; Alfredo Huete; Yongguang Zhang; Cynthia Bresloff; Travis E. Huxman; Derek Eamus; David D. Bosch; Anthony R. Buda; Stacey A. Gunter; Tamara Heartsill Scalley; Stanley G. Kitchen; Mitchel P. McClaran; W. Henry McNab; Diane S. Montoya; Jack A. Morgan; Debra P. C. Peters; E. John Sadler; Mark S. Seyfried; Patrick J. Starks;

  • 作者单位

    USDA ARS Southwest Watershed Research, Tucson, Arizona 85719, USA,Soi I, Water & Environ mental Sciences, University of Arizona, Tucson, Arizona 85721, USA;

    USDA ARS Southwest Watershed Research, Tucson, Arizona 85719, USA;

    Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, New South Wales 2007, Australia;

    USDA ARS Southwest Watershed Research, Tucson, Arizona 85719, USA;

    Soi I, Water & Environ mental Sciences, University of Arizona, Tucson, Arizona 85721, USA;

    Ecology & Evolutionary Biology, University of California, Irvine, California, USA and Center for Environmental Biology, University of California, Irvine, California 92697, USA;

    Plant Functional Biology and Climate Change Cluster, University of Technology Sydney, New South Wales 2007, Australia;

    USDAARS Southeast Watershed Research Laboratory, Tifton, Georgia 31793, USA;

    USDAARS Pasture Systems & Watershed Management Research Unit, University Park, Pennsylvania 16802, USA;

    USDA ARS Southern Plains Range Research Station, Woodward, Oklahoma 73801, USA;

    USDA FS International Institute of Tropical Forestry, Rio Piedras 00926, Puerto Rico;

    USDA FS Rocky Mountain Research Station Shrub Sciences Laboratory, Provo, Utah 84606, USA;

    School of Natural Resources & the Environment, University of Arizona, Tucson, Arizona 85721, USA;

    USDA FS Southern Research Station, Asheville, North Carolina 28806, USA;

    USD AFS Pacific Southwest Research Station, Arcata, California 95521, USA;

    USDA ARS Rangeland Resources Research Unit, Fort Coll ins, Colorado 80526, USA;

    USDA ARS Jornada Experimental Range & Jornada Basin Long Term Ecological Research Program, New Mexico State University, Las Cruces, New Mexico 88012, USA;

    USDA ARS Cropping Systems & Water Quality Research Unit, Columbia, Missouri 65211, USA;

    USDA ARS Northwest Watershed Research Center, Boise, Idaho 83712, USA;

    USDA ARS Grazinglands Research Laboratory, El Reno, Oklahoma 73036, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号